At the sound of the tone... resonate

Resonance. That sound that still exists in your brain after a really long, or powerful note, at the end of a classical piece of music, or hell, classic rock for that matter (think: A Day in the Life by the Beatles)... that's what I'm talking about. Us old TV watchers know it as retina burn, when the Zenith got flicked off but images still remained like ghosts on the screen. Or we imagined they remained. I say old TV watchers, because I'm not sure it works that way anymore. Maybe retina burn...